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<h1 class="title">Generics</h1>
<p><small>There is a new edition of the book and this is an old link.</small></p>
<blockquote>
<p>Generics are abstract stand-ins for concrete types or other properties.</p>
</blockquote>
<pre class="rust rust-example-rendered">
<span class="kw">struct</span> <span class="ident">Point</span><span class="op"><</span><span class="ident">T</span>, <span class="ident">U</span><span class="op">></span> {
<span class="ident">x</span>: <span class="ident">T</span>,
<span class="ident">y</span>: <span class="ident">U</span>,
}
<span class="kw">fn</span> <span class="ident">main</span>() {
<span class="kw">let</span> <span class="ident">both_integer</span> <span class="op">=</span> <span class="ident">Point</span> { <span class="ident">x</span>: <span class="number">5</span>, <span class="ident">y</span>: <span class="number">10</span> };
<span class="kw">let</span> <span class="ident">both_float</span> <span class="op">=</span> <span class="ident">Point</span> { <span class="ident">x</span>: <span class="number">1.0</span>, <span class="ident">y</span>: <span class="number">4.0</span> };
<span class="kw">let</span> <span class="ident">integer_and_float</span> <span class="op">=</span> <span class="ident">Point</span> { <span class="ident">x</span>: <span class="number">5</span>, <span class="ident">y</span>: <span class="number">4.0</span> };
}<a class="test-arrow" target="_blank" href="https://play.rust-lang.org/?code=%23!%5Ballow(unused)%5D%0Astruct%20Point%3CT%2C%20U%3E%20%7B%0A%20%20%20%20x%3A%20T%2C%0A%20%20%20%20y%3A%20U%2C%0A%7D%0A%0Afn%20main()%20%7B%0A%20%20%20%20let%20both_integer%20%3D%20Point%20%7B%20x%3A%205%2C%20y%3A%2010%20%7D%3B%0A%20%20%20%20let%20both_float%20%3D%20Point%20%7B%20x%3A%201.0%2C%20y%3A%204.0%20%7D%3B%0A%20%20%20%20let%20integer_and_float%20%3D%20Point%20%7B%20x%3A%205%2C%20y%3A%204.0%20%7D%3B%0A%7D">Run</a></pre>
<hr />
<p>Here are the relevant sections in the new and old books:</p>
<ul>
<li><strong><a href="second-edition/ch10-00-generics.html">In the second edition: Ch 10.00 — Generic Types, Traits, and Lifetimes</a></strong></li>
<li><small><a href="first-edition/generics.html">In the first edition: Ch 3.18 — Generics</a></small></li>
</ul>
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